Precious metal-silicon composite powder prepared through galvanic reaction and application thereof

A technology of composite powder and metal silicon powder, which is applied in the direction of metal/alloy conductors, etc., can solve the problems of increasing the preparation cost of silver-coated composite materials, limited reducing agents, high process requirements, etc., and achieves easy industrial production, easy operation, and preparation The effect of simple process

Active Publication Date: 2015-10-14
哈尔滨化兴软控科技有限公司
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These complicated steps and high process requirements also increase the preparation cost of silver-coated composite materials virtually.
The most important thing is that the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Precious metal-silicon composite powder prepared through galvanic reaction and application thereof
  • Precious metal-silicon composite powder prepared through galvanic reaction and application thereof
  • Precious metal-silicon composite powder prepared through galvanic reaction and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The silver-silicon composite powder prepared by the galvanic reaction of this embodiment is made by the following method:

[0045] (1) Prepare a hydrofluoric acid solution with a concentration of 5mol / L, and stir the hydrofluoric acid solution;

[0046] (2) Add the hydrofluoric acid solution prepared in step (1) into a container containing 0.7mol ultrafine silicon powder, and continue to stir to remove the oxide layer on the surface of the ultrafine silicon powder; since the surface of the silicon powder is oxidized , so the surface SiO 2 It will be corroded by hydrofluoric acid, and a large number of irritating bubbles will be generated in the solution. The specific reaction is as follows: SiO 2 +6HF→H 2 SiF 6 +2H 2 O;

[0047] After the EDX element test, the oxygen content of the ultrafine silicon micropowder is 16%, corresponding to the SiO2 content of 30%, which is corroded by hydrofluoric acid, so only 70% of the silicon remains to participate in the subsequen...

Embodiment 2

[0058] The difference between this example and Example 1 is that in step (1), a hydrofluoric acid solution with a concentration of 1 mol / L is prepared; The silicon waste produced during sawing, edging, polishing, and multi-wire cutting machine processing, the average particle size of the silicon waste is 5 microns; in step (3), configure 2L of a solution containing 0.001mol / L silver nitrate; silver nitrate solution Silver oxide was reacted with nitric acid and dissolved in water; in step (4), the galvanic reaction time was 60 minutes; in step (5), the powder was separated by filtration, elemental analysis of silver-silicon composite powder, silver in silver-silicon composite powder : Silicon ≈ 3:7, silver accounts for 30% of the composite powder, and silicon accounts for 70%.

[0059] All the other are with embodiment 1.

[0060] Application: Apply the above silver-silicon composite powder to conductive ink for printed electronics. According to the conventional process of co...

Embodiment 3

[0062] The method for preparing gold-silicon composite powder by galvanic reaction in this embodiment, and the application of the gold-silicon composite powder prepared by this process, includes the following steps:

[0063] (1) Prepare a hydrofluoric acid solution with a concentration of 3mol / L, and stir the hydrofluoric acid solution;

[0064] (2) Slowly add the hydrofluoric acid solution prepared in step (1) into a container containing 40 grams of ultrafine silica powder, and continue stirring to remove the oxide layer on the surface of the ultrafine silica powder; oxidized, so the surface SiO 2 It will be corroded by hydrofluoric acid, and a large number of irritating bubbles will be generated in the solution. The specific reaction is as follows: SiO 2 +6HF→H 2 SiF 6 +2H 2 O;

[0065] (3) Prepare a solution containing about 24 grams of chloroauric acid, the gold content is about 14 grams, which is 0.071 mol;

[0066] (4) Gradually add the chloroauric acid solution in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Resistivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses precious metal-silicon composite powder prepared through a galvanic reaction and an application thereof, and belongs to the technical field of conductive materials. The electron gain or loss in the Si-Si key is matched with chemical potentials restored by Au3+/Au, Ag+/Ag, Cu2+/Cu and other atoms, and superfine silicon powder and a solution with precious metal ions have a galvanic displacement reaction in the HF environment; the superfine silicon powder is used as a reducing agent and a reaction carrier as well, and the precious metal Au, Ag, Cu and the like are gradually deposited on the surface of the superfine silicon powder after being displaced from the solution to form a precious metal-silicon (shell-core) micro-nanostructure particle. Due to the fact that the surface of the shell-core micro-nanostructure particle is provided with a precious metal layer, the particle has the characteristics of precious metal, like high conductivity. However, the precious metal use amount is greatly reduced, and therefore the cost can be greatly reduced.

Description

technical field [0001] The invention relates to a noble metal-silicon composite powder, in particular to a noble metal-silicon composite powder prepared by galvanic reaction and its conductive application. Background technique [0002] Precious metals such as gold, silver, copper and their powders are commonly used metal materials. Due to its excellent electrical conductivity, chemical catalytic activity and other properties, precious metal powder has been used as a raw material for conductive paste, and precious metals also play an important role in the field of catalysts. [0003] With the increasing emphasis on environmental protection in various countries, the development of new energy vehicles, especially electric vehicles, has entered a blowout period. As key supporting power batteries and fuel cells, more and more attention has been paid, especially the precious metal catalyst platinum used in fuel cells. Demand for palladium powder materials will also increase rapid...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F1/02B22F9/24H01B1/02B22F1/18
CPCB22F1/18
Inventor 吕铁铮赵丽丽
Owner 哈尔滨化兴软控科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap